Hydraulic speed-changing and reversing mechanism.



V nrrn site HORACE L. WORDEN, OF PHOENIX, ARIZONA.

HYDRAULIC SPEED-CHANGING ANDiB/EVERSING- MEHANISM.

Specification of vLetters Patent.

Patented-.nay 2o, 1915.

Application led August 13, 1913. Serial No. 784,570.

To lall 'whom imag concern.'

Be it known that I, Hormon L. WORDEN, a. citizen of the United States, residing at lhoenix, in the county of Maricopa and State of Arizona, have invented new and useful Improvements in IIydraulic Speed- Changing and `Reversing Mechanism, of which the followingl is a specification.

This invention relates to hydraulic speed changing and reversing mechanism, the object in view being to produce changeable speed and reversing transmission mechanism designed to be introduced between a drive and driven shaft in various types of maehinery whereby, with the aid of manual control, any desired speed may be imparted to the driven shaft and the direction of rotation of said driven sha-ft reversed and said shaft driven at any desired rate of speed in either direction. The mechanism also provides for applying braking power to the driven shaft and also entirely'stopping said driven sha-ft according to the desire of the operator.

A further object of the invention is to produce changeable speed and reversing mechanism of the character above referred to without the use ofany gears or pulleys as said terms are generally understood and also to secure the desired -braking -action without the use of the usual brake bands, straps, shoes and other ordinary friction devices.

With the above and other objects in View, the invention consists in the construction, combination and arrangement of parts, as will hereinafter be more fully described, illustrated and claimed.

In the accompanying drawings: Figure 1 ,is a longitudinal section through the entire mechanism taken on the line 5-6 of Figs. 2 and 3. Fig. Q is also a longitudinal section through the mechanism taken on the line 1 2 of Fig. 1i Fig. 3 is a cross section on the line 34 of Fig. 1. Fig. 4 is an end elevation of one of the members of either the pump or motor showing the means for packing the working faces thereof. Fig. 5 is a detail edge view of one of the wings thereof. Fig. 6 is a longitudinal section through one of said wings. Fig. 7 is a detail view of one of the packing sections.

Referring primarily to Figs. 1, 2 and 3 which illustrate the invention in compact form, A designates a hydraulic pump and B a motor.

In the preferred and simplest embodiment. of this invention, the two members of the pump are constructed and relatively arranged for cooperation as illustrated in the cross section Fig. 3 and it may be noted at this point that the two members of the motor B are of exactly the same construe# tion so that the cross section Fig. 3 would apply to the motor B as well as to the pump A, it being therefore considered unnecessary to separately illustrate both portions of the mechanism referred to in cross section.

As shown in Figs. 1 and 3, the shaft C of one member ofthe pump is stationary and round in cross section and is surrounded by an annular series of anti-friction rollers 1 which are contained within the bore of the pump member as clearly shown in Fig.V 3 thereby permitting said pump member to revolve with a minimum amount of friction. The other pump memberindicated at A is of the same size andl outer contour as thev member A but is shown as mounted on the' squared portion 2 of a driving shaft F which may derive its motion from any suitable engine.

The rotary pump members A and A arev ling mounted rotatably in a pump casing L1A having an inlet passage 5 which is controlled by a manually Operable valve R. This valve R is designed to be opened to a greater or lessextent by hand so as to regulate the amount of liquid which may be drawn by suction into the pump casing 4 by the action of the members A and A of the pump. In this way the speed of the driven shaft hereinafter referred to may be regulated.

The members B and B are the exact counterparts of the pump members A and A andare mounted Withina casing corresponding with the pump casing 4. The member B is mounted on the squared portion of the driven shaft E.

7 and 8 designate stufling box glands which arel fastened to the Opposite heads 9 and 10 lof the frame or casing of the ma chine by means of bolts 11 containing nuts 12 by means of which the glands may be adjusted. The heads 10 are Secured to the pump and motor casings 4 and 6 by means of screws or bolts 13.

Interpos'ed between the pump and motor casings isa valve casing .14 containing an.. 'inlet passage lll from the pumpA casing, said 4. passage H being formed about centrally of the casing '14C with a T-eXtension 15 leading in 'opposite directions to two valve' chambers .in which are arranged valves K and L having 'ports extending through the same as best illustrated in l'zig. 2. ldrom the valve K a passage M leads .into the motor casing at y wardly and projectbeyond thecasing as indicated in Fig. l, said valve .stems passing through stuiiing boxes 16. The stems G are connected together by any convenient means so that they may be simultaneously operated. Uutlet or return passages 0 and P extending through opposite sides of the casing la are controlled by the valves K and L from l which the liquid supply leads back to a suitable reservoir hereinafter referred to enabling the liquid to be used over and over again. rlh-e valve casing 14 is fastened to the pump and motor casings by means of screws 17 or their equivalent.

lt will now be understood thatthe rotary pump is actuated'by the driving shaft F, drawing the oil or other liquid through the valve R, the latter being manipulated at the will ot the operator to increase or diminish the low of liquid. The liquid is forced through the valve K and passage M into the motor chamber, driving said motor in one direction rand imparting a corresponding movement to the driven shaft E. Ilhe liquid then returns through the passage N, the

`valve lb and .passage l? back to the reservoir Where it is available for further use. As above indicated the valves K and L are linked together so'that they may both be simultaneouslyl shifted or turned by the 'op erator to reverse conditions, or in ot L words, to reverse the direction of movemen of the liquid through the motor chamber,

i thus e'ecting a -'reversal of the shaft E;

thus theliquid passes from the passage H through the valve L and passage N into the motor chamber and returns therefrom through the passage M, valve K and outlet passage O back to thereservoir.

'olf the operator wishes to stop the drivenshaft E, the valves K and L areturned lso as to close the passages M and N and leave free the passages O and P, which both communicate with the reservoir. Shouldthe operator desire to change the speed of the motor B and consequently thedriven shaft E, this is accomplished by adjustingthe valve R which controls the amount of liquid supply to the rotary pump. To utilize the ,mechanism as a brake for the shaft E, the" valves K and L are partially closed accordkinds of :mach

Lighted ing to the amount of braking action desired, thereby equalizing the pressure ci the liquid on both sides of the members and ld.

ln order to obtain liquid-tight lit between the wings of the members A and A of the pump and also the members B and B of the motor, the construction illustrated in Figs. a to 'i' inclusive is resorted to. ln said figures 18 designates one of 'the members of either the pump or the motor and 19 the wings thereof. Each of said wingsv is provided in its opposite end with grooves 20 in which are placed metal packing plates or strips 21 held in place by screws or their equivalent 22. 'The outer extremities of the e plates 21 are out away or recessed as shown at 23 to receive the opposite extremities of peripherally arranged 'metal packing strips 24 one of which is shown in detail in lllig. 7, the extremities of said strip being notched as shown at 25 to interlock with the notched extremities of the 'end strips 21., The strip 24 is also ormedwith slots 26 extending transversely thereof and receiving retaining pins 27 which pass transversely through the outer portion of each wing 19, the slots 26 admitting of the necessary radial movement of the strip 2i to provide tor a close contact between each and every wing of the member 18l and the adjacent coperating member, as e5 well as the inner wall of the casing d or 6, as the case may be, in which the member 18 works.

lt will therefore be apparent from the foregoing description that the pump and motor may either be closely coupled or remotely located, in the latter case being connected together bysuitable piping.

While l have only described aevv applications of the changeable speed and reversing mechanism of this invention it will also be perfectly obvious that the mechanism re- -erred to may be applied to various other inery and vehicles such as nd mills, individual shop machinery' drives, such as lathes, drill presses,

grinders, milling machines, planers, Shapers,

, printing presses, ruling machines, paper cutters and other machinbs too numerous to mention. i j

What ll claim is: Hydraulic transmission mechanism comprlsmg a pump casing,v a valve casing, and a motor casing, all arranged in tandem relation to each other with the valve casing 12o interposed between the pump and motor casings and forming the inside heads of the last named casings, a driving shaft entering the pump casing, a pump actuated by said shaft,

a' driven shaftdn longitudinal vvalinement 12b with the driving shaft entering the motor casing, a motor intheflaet named casing actuating said drivenshaft, the vralve casingr embodying athreeway passage one branch ont which enters the pump casing andthe is@ named branches., and both communicating.,

with a common liquid supply, and a pair of l valves controlling said branches and adjust.

able to open communication between the pump casing and either of said last named branches regu1ate the flow of liquld, and

reverse the motor, and also cut ol the flow ofliquid to the motor.

In testimony whereof I aflx my signature in presence of Vtwo witnesses. 1

- HORACE L. WORDEN.

Witnesses: c

f GEORGE R.- .CorsoN,

Lum: W. HENDnRsoN. 

